Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - NETWORKING

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PRECAUTION

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK FOR OPEN IN CAN BUS WIRE (CERTIFICATION ECU CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

DTC U0327 Software Incompatibility with Vehicle Security Control Module

DESCRIPTION

DTC CodeDTC Detection ConditionTrouble Area
U0327There is no communication from the certification ECU (smart key ECU assembly).
Power source circuit of certification ECU (smart key ECU assembly)
Certification ECU (smart key ECU assembly) CAN branch wire or connector
Certification ECU (smart key ECU assembly)
For vehicles with an entry and start system.

WIRING DIAGRAM

Dtc U0327 Software Incompatibility With Vehicle Security Control Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

  • NOTICE:
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • HINT:
  • Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.PRECAUTION
  • NOTICE:
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work ().
NEXT
2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

  • CAUTION:
  • For vehicles with an SRS system:
  • Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
  • NOTICE:
  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
NEXT
3.CHECK FOR OPEN IN CAN BUS WIRE (CERTIFICATION ECU CAN BRANCH WIRE)
Dtc U0327 Software Incompatibility With Vehicle Security Control Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E29 certification ECU (smart key ECU assembly) connector.

Measure the resistance according to the value(s) in the table below.

  • Standard Resistance:
  • Tester ConnectionSwitch ConditionSpecified Condition
    E29-27 (CANH) - E29-28 (CANL)Ignition switch off54 to 69 Ω
Text in Illustration
*aFront view of wire harness connector
(to Certification ECU [Smart Key ECU Assembly])
NG
REPAIR OR REPLACE CERTIFICATION ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)
OK
4.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)
Dtc U0327 Software Incompatibility With Vehicle Security Control Module. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Connect the cable to the negative (-) battery terminal.

  • NOTICE:
  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().

Measure the resistance according to the value(s) in the table below.

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    E29-17 (E) - Body groundAlwaysBelow 1 Ω

Measure the voltage according to the value(s) in the table below.

  • Standard Voltage:
  • Tester ConnectionConditionSpecified Condition
    E29-1(+B) - Body groundAlways11 to 14 V
    E29-19 (ACC) - Body groundIgnition switch ACC11 to 14 V
    E29-18 (IG) - Body groundIgnition switch ON11 to 14 V
Text in Illustration
*aFront view of wire harness connector
(to Certification ECU [Smart Key ECU Assembly])
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
NETWORKING
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
CAN COMMUNICATION SYSTEM for LHD